Date   : Wed, 15 Jan 1986 09:11:45 EST (Wednesday)
From   : waldron.Wbst@XEROX.ARPA
Subject: 8 bit data in Mex update

>Does anyone know of a way to patch Mex to allow 8 bit data to be passed
to the >terminal.  I would like to have the remote host send graphics
characters to the >screen but Mex seems to AND off the 8th bit.  Turning
on DEBUG shows that valid 8 >bit graphics characters are being sent but
in normal terminal mode they get >stripped.

>Thanks,

>Brian 

To all those who responded, thank you.  To all those who mentioned
STAT FILTER OFF, I have been running this way since day ONE.  STAT
FILTER OFF controls the passage of data values from 0 to 1F hex. I
have no problem with those.  Values from 80 to FF hex are the
problem.  They come through with the 8th bit reset.  In other words,
ANDed with 7F hex.  I have comfirmed, using a very simple dumb terminal
program, that neither BDOS nor BIOS interferes with 8Bit (0 - FF hex)
data.   There are  20 some AND 7F instructions in Mex.  Without
source it's pot luck but I will try the hard way to determine which
AND 7F is the culprit.

Thanks again to all who responded.  I will post results when they are
available.

Brian 
Waldron.wbst@Xerox.arpa